Motorcycle muffler



FIG. 1 is a front elevational view of a motorcycle muffler showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a front perspective view thereof; and,

FIG. 8 is a rear perspective view thereof.

The broken line showing of the environment is for illustrative purposes only and forms no part of the claimed designs.

The portion encompassed by a solid line is the design sought to be patented. 

The ornamental design for a motorcycle muffler, as shown and described. 